People should learn from their mistakes, or so we usually all agree. Yet that mostly doesn’t happen. Instead, we get disturbing “serenity” and denial, and we had a prime example of it this week. So it is crucial we develop ways to make learning from mistakes more likely. I’d ban forecasts altogether in central banks if it would make officials pay more attention to what surprises them.
The most powerful institutions in the world economy can’t predict very well. But at least they could learn to adjust to the unexpected.
The Governor of the Bank of England, Mark Carney, testified before Parliament this week to skeptical MPs. The Bank, along with the IMF, Treasury, and other economists, predicted near-disaster if the UK voted for Brexit. So far, however, the UK economy is surprising everyone with its resilience.
So did Carney make a mistake? According to the Telegraph,
If Brexiteers on the Commons Treasury Committee were hoping for some kind of repentance, or at least a show of humility, they were to be sorely disappointed. Mr Carney was having none of it. At no stage had the Bank overstepped the mark or issued unduly alarmist warnings about the consequences of leaving, he insisted. He was “absolutely serene” about it all.
This is manifestly false and it did not go down well, at least with that particular opinion writer.
Arrogant denial is, I suppose, part of the central banker’s stock in trade. If a central bank admits to mistakes, then its authority and mystique is diminished accordingly.
I usually have a lot of regard for Carney, and worked at the Bank of England in the 1990s. But this response makes no sense. Central banking likes to think of itself as a technical trade, with dynamic stochastic general equilibrium models and optimum control theories. Yet the core of it has increasingly come down to judging subjective qualities like credibility, confidence, and expectations.
Economic techniques are really no use at all for this. Credibility is not a technical matter of commitment, time consistency and determination, as economists often think since Kydland & Prescott. It is much more a matter of whether people consider you are aware of the situation and can balance things appropriately, not bind yourself irrevocably to a preexisting strategy or deny mistakes. It is as much a matter of character and honesty as persistence.
The most frequent question hedge funds used to ask me about the Fed or other central banks was “do they see x?” What happens if you are surprised? Will you ignore or deny it and make a huge mistake? Markets want to know that central banks are alert, not stuck in a rut. They want to know if officials are actively testing their views, not pretending to be omniscient. People want to know that officials aren’t too wrapped up in a model or theory or hiding under their desks instead of engaging with the real world.
It might seem as if denial is a good idea, at least in the short term. But it is the single most durable and deadly mistake in policymaking over the centuries. The great historian Barbara Tuchman called it “wooden-headedness,” or persistence in error.
The Bank of England, like other monetary authorities, issues copious Inflation Reports and projections and assessments. But it’s what they don’t know, or where they are most likely to miss something, which is most important. Perhaps the British press is being too harsh on Carney. Yet central banks across the world have hardly distinguished themselves in the last decade.
We need far fewer predictions in public policy, and far more examination of existing policy and how to adjust it in response to feedback. Forget about intentions and forecasts. Tell us what you didn’t expect and didn’t see, and what you’re going to do about it as a result. Instead of feedforward, we need feedback policy, as Herbert Simon suggested about decision-making. We need to adapt, not predict. That means admitting when things don’t turn out the way you expected.